The giant considered the maps, blinking from time to time. Each blink was matched with a click.
"What is that?" Antoni asked.
"I'm simply storing data."
"Your eyes are like a camera?"
"Yes. I suppose you could think of it that way." His eyes clicked again. Now he was looking at her.
"You recorded my pict?" she asked.
"Yes, primary clerk. Target recognition. I'd hate to shoot you by accident."

Brothers of the Snake pg. 41